/**

 * jCarouselLite - jQuery plugin to navigate images/any content in a carousel style widget.

 * @requires jQuery v1.2 or above

 *

 * http://gmarwaha.com/jquery/jcarousellite/

 *

 * Copyright (c) 2007 Ganeshji Marwaha (gmarwaha.com)

 * Dual licensed under the MIT and GPL licenses:

 * http://www.opensource.org/licenses/mit-license.php

 * http://www.gnu.org/licenses/gpl.html

 *

 * Version: 1.0.1

 * Note: Requires jquery 1.2 or above from version 1.0.1

 */



//调用方法

//if($('#hfList').size()>0){

//	$('#hfList').jCarouselLite({

//		btnPrev: '#hfPrev',

//		btnNext: '#hfNext',

//		liSize:144

//	});	

//}



(function($) {                                          // Compliant with jquery.noConflict()

$.fn.jCarouselLite = function(o) {

    o = $.extend({

        btnPrev: null,

        btnNext: null,

        btnGo: null,

        mouseWheel: false,

        auto: null,



        speed: 500,

        easing: null,



        vertical: false,

        circular: true,

        visible: 3,

        start: 0,

        scroll: 1,



        beforeStart: null,

        afterEnd: null,

        

        ulDom: null,

        liDom: null,

        liSize:null ,

        datetime :(new Date()).valueOf()

        

        

        

    }, o || {});



    return this.each(function(n) {            



        var running = false, animCss=o.vertical?"top":"left", sizeCss=o.vertical?"height":"width";

        var div = $(this);

        

        var ul = o.ulDom==null ? $("ul", div) : $(o.ulDom, div);

		var v = o.visible;

        



 

        var li = o.liDom==null ? $("li", ul) : $(o.liDom, ul);

        

       

        

        var itemLength = li.size(), curr = o.start;

        div.css("visibility", "visible");

        



        //li.css({overflow: "hidden", float: o.vertical ? "none" : "left"});

        //ul.css({margin: "0", padding: "0", position: "relative", "list-style-type": "none", "z-index": "1"});

        div.css({overflow: "hidden", position: "relative", "z-index": "2", left: "0px"});

		

		//alert(o.liSize);

		if(o.liSize==null){

			var liSize = o.vertical ? height(li) : width(li);

		}

		else{

			var liSize = o.liSize;

		}

           // Full li size(incl margin)-Used for animation

        var ulSize = liSize * itemLength;                   // size of full ul(total length, not just for the visible items)

        var divSize = liSize * v;                           // size of entire div(total length for just the visible items)



        //li.css({width: li.width(), height: li.height()});

        ul.css(sizeCss, ulSize+"px")

        //.css(animCss, -(curr*liSize));



        //div.css(sizeCss, divSize+"px");                     // Width of the DIV. length of visible images

		

		if(1){

			

			$.extend({

				autoChange:function(){

					ul.animate({'marginLeft':-liSize},function(){

						$(this).css('marginLeft',0);

						ul.find(o.liDom !=null ? o.liDom : 'li' +':first').appendTo(ul);

						

					});

				}

			})

			//alert(n);

//			Date.parse(new Date()); 时间戳

			//console.log((new Date()).valueOf());

			 

//			o.datetime = setInterval("$.autoChange()",4000);

//			

//			

//			div.mouseover(function(){

//				clearInterval(o.datetime);

//			})

//			div.mouseout(function(){

//				o.datetime = setInterval("$.autoChange()",4000);					 

//			})

			

		}

        if(o.btnPrev)

            $(o.btnPrev).click(function() {

                //return go(curr-o.scroll);

               // return go(-1);

                

                

                ul.animate({'marginLeft':-liSize},function(){

					$(this).css('marginLeft',0);

					ul.find(o.liDom !=null ? o.liDom : 'li' +':first').appendTo(ul);

					

				});

                

                

            }); 



        if(o.btnNext)

            $(o.btnNext).click(function() {

                //return go(1);

                ul.css('marginLeft',-liSize);

                ul.find(o.liDom !=null ? o.liDom : 'li' +':last').prependTo(ul);

				ul.animate({'marginLeft':0});

            });



        if(o.btnGo)

            $.each(o.btnGo, function(i, val) {

                $(val).click(function() {

                    return go(o.circular ? o.visible+i : i);

                });

            });



        if(o.mouseWheel && div.mousewheel)

            div.mousewheel(function(e, d) {

                return d>0 ? go(curr-o.scroll) : go(curr+o.scroll);

            });



        if(o.auto)

            setInterval(function() {

                go(curr+o.scroll);

            }, o.auto+o.speed);



        function vis() {

            return li.slice(curr).slice(0,v);

        };



        function go(to) {

            if(!running) {



//              if(o.beforeStart)

//                  o.beforeStart.call(this, vis());

//

//              if(o.circular) {            // If circular we are in first or last, then goto the other end

//                  if(to<=o.start-v-1) {           // If first, then goto last

//                      ul.css(animCss, -((itemLength-(v*2))*liSize)+"px");

//                      // If "scroll" > 1, then the "to" might not be equal to the condition; it can be lesser depending on the number of elements.

//                      curr = to==o.start-v-1 ? itemLength-(v*2)-1 : itemLength-(v*2)-o.scroll;

//                  } else if(to>=itemLength-v+1) { // If last, then goto first

//                      ul.css(animCss, -( (v) * liSize ) + "px" );

//                      // If "scroll" > 1, then the "to" might not be equal to the condition; it can be greater depending on the number of elements.

//                      curr = to==itemLength-v+1 ? v+1 : v+o.scroll;

//                  } else curr = to;

//              } else {                    // If non-circular and to points to first or last, we just return.

//                  if(to<0 || to>itemLength-v) return;

//                  else curr = to;

//              }                           // If neither overrides it, the curr will still be "to" and we can proceed.



				curr = to;



                running = true;

				

				//alert(curr);

                ul.animate(

                    animCss == "left" ? { left: -(curr*liSize) } : { top: -(curr*liSize) } , o.speed, o.easing,

                    function() {

                        if(o.afterEnd)

                            o.afterEnd.call(this, vis());

                        running = false;

                    }

                );

                // Disable buttons when the carousel reaches the last/first, and enable when not

                if(!o.circular) {

                    $(o.btnPrev + "," + o.btnNext).removeClass("disabled");

                    $( (curr-o.scroll<0 && o.btnPrev)

                        ||

                       (curr+o.scroll > itemLength-v && o.btnNext)

                        ||

                       []

                     ).addClass("disabled");

                }



            }

            return false;

        };

    });

};



function css(el, prop) {

    return parseInt($.css(el[0], prop)) || 0;

};

function width(el) {

    return  el[0].offsetWidth + css(el, 'marginLeft') + css(el, 'marginRight');

};

function height(el) {

    return el[0].offsetHeight + css(el, 'marginTop') + css(el, 'marginBottom');

};



})(jQuery);